Improvement in adding-mach ines



- E. L. 'BILL. Adding-Machine.

No. 209,644. Patented Nov. 5,1878.

UNITED STATES PATENT Ora-non.

EDYVARD L. BILL, OF YVHEELING, VEST VIRGINIA.

IMPROVEMENT lN ADDlNG-MACHl-NES.

Specification. iorming part of Letters Patent No. 209,644, datedNovember 5, 1878; application filed August 20, 1878.

To all whom it may concern:

Be it known that I, EDWARD L. BILL, of Wheeling, in the county of Ohioand State of Vest Virginia, have invented certain new and usefulLnprovements in Calculating or Adding-Machines; and I do hereby declarethat the following is a full, clear, and exact description thereof,which will enable others skilled in the art to which it appertains tomake and use the same, reference being had to the accompanying drawings,which form a part of this specification, and in which Figure 1 is a planview of my improved calculating or adding machine. Fig. 2 is a similarview, with the face-plate removed. Fig. 3 is a side view, showing one ofthe viewingapertures in the case, which is broken away. Fig. i is asimilar view, showing the other viewing-aperture in the ease, with easebroken away. Fig. 5 is a detailed view of one of the tape-carryingdrumsand its spring; and Figs. 6 and 7 are views in detail of a portionof the registering-tape.

Corresponding parts in the several figures are denoted by like letters.

This invention appertains to certain improve ments in calculating oradding machines 5 and it consists, primarily, in the particular arrangement and operation of two toothed drums, one having a tension-springand a series of apertures or perforations, arranged with reference to asegmental opening in the inclosing-case, around which drums is passed atape, upon which is impressed or printed columns of figures, viewedthrough apertures in the case; and, secondarily, in the employment, inconnection with one of said drums, of a tensionspring, to take up slackin the tape between the drums, substantially as hereinafter more fullyset forth.

in the drawing, A is a case, of any suitable construction and shape. B Brefer to two drums, hung in the case A, to one side of each of which isaffixed a toothed wheel or disk, 0 G, engaging with each other andimparting a reverse movement to the drums, to cause the winding up ofthe registeringtape by one during its unwinding from the other. 1) isthe registering-tape, coiled around either one, or

partially around both, of the drums 13 B. The

tape D passes over and under the intermediate rollers or cylinders E E,respectively, and has printed or impressed upon each side a column orcolumns of figures, those on one side indicating dollars and cents, orthey may have no value attached to them, while those on the other sidemay represent pounds, shillin and pence, (the English currency,) orother foreign denomination. In the sides or edges of the case A areviewingapertures F F, through which may be observed the column orcolumns of figures upon each side of the tape, so as to perform anyaddition or calculation desired, either in simple or abstract figures,in United States currency, or in English or other foreign currency, asmay be desired, to be more fully understood from the following:

In the face of the disk B are a series of perforations or holes, G G,arranged at intervals apartto agree with the spaces between each figure,placed one above the other, or the spaces between each transverse row offigures, which series of perforations G G are reached through asegmental opening or slot, ii, in the case A by a pointer or othersuitable instrument that will enter the said perforations.

The slot is preferably graduated or marked off on the face of the caseMinto twenty equal parts, indicating each a shilling.

3y turning the disk or drum 13 with an instrument, as above indicated,equal to any one, two, or more of the spaces between the perforations GG, the corresponding number of ures on the tape 1) will be exposedthrough the viewii'lg-apertures F F, those seen through one aperture,say, F, representing abstract numbers or United States currency, andthose seen through the other aperture, F, representing English or otherforeign currency. This operation or turning of the disk or drum F, withits fellow B, can be repeated, and the addition or calculation proceededwith. ad infinitum.

It will be observed that, in adding or calculating in English. currencyor table, by turning the disk B the whole length of the slot ll oftwenty shillings, indicating one pound, the registering of the poundswill agree with the numbers in the United States table seen through theopposite viewing-aperture, thereby obviating the multiplying of columnsor B B, with or without a tension-spring, of the increasing the width ofthe tape and the enlarging of the case A.

To take up the slack tape between the drums B B, the drum B is providedwith a spring, I, thus keeping it (the tape) constantly under tensionwhen partially coiled upon each drum.

Having thus fully described my invention, I claim and desire to secureby Letters Patent of the United States- In a calculating or addingmachine, the combination, with the toothed perforated drumsregistering-tape D and case A, having the viewing-apertures F F andsegmental or other shaped slot H, substantially as and for the purposeset forth.

In testimony that I claim the foregoing as my own I have hereuntoaffixed my signature in the presence of two witnesses.

- EDWARD L. BILL.

Witnesses:

JAMES E. WAUGH, AUGUST PETERSON.

